Automobile crankcase oil draining apparatus



Patented Sept. 30, 1952 AUTOMGBILE CRANKCASE OI'IJ DRAININ'G APPARATUS Frederick.A. .Koester, Los-Angeles, Caliili 'ApjplicationApx-ilt; 1950; Serial-N0. 1541239 r v 1;. v My invention relates-to oil' removing-apparatus for automobile-crankcases; -Heretofore; order to -drain oilfrom anautomobile crankcase, ithas been the custom to runthe automobile ona grease. rack. This involves considerable time and.

trouble and requires, for reason of safety, that the passengers leave the vehicle. Attemptshavebeen made to pump out'the crankcase oil, utilizing the oil filler tube; to avoid under-the-car operation; however; such apparatus has been expensive and cumbersome to-use;

' Ari-object of my invention is toprovi'de 'an-oil removing apparatus which maybe wheeled into position beside a 'vehicle and withdrawthe oil 'thrcugh-thefiller tube intoa collector tank.

A further object is to provide an oil removing apparatus whereinthe filler tank is subjected only to negative pressures while the crankcase is filled, the negative pressure bein'gcreated by an 'airaspiratoroperated by the compressed air always available at service stations A still further object is, to provide-anappara-tusofthis class whereinflow of'oil-may be-observed and Warning is given when the" collector tank approaches a full condition.

A further object is to provide-in an apparatus of this class, means utilizingth'e air aspirator and manualcontrol, whereby a moderate'amount of pressure may-be applied to the collector tank w-henit is desired'to-empty the tank, such means being'fool proof *in'that excessivepressure cannot be applied.

With. the' above" and other objects in view as may appear hereinafter, reference is made to the accompanying; drawings,. in. which:

Figure 1. is apartial. sectionalpartial elevational view of my oil removing apparatus.

Figure 2 is an enlarged fragmentary sectional view thereof, takenthrough-"2 2 of Figure 1,

showing; the apparatus arranged for the with-- drawal. of crankcase oil- I Figure: 3! is.- a. sectional View." thereof, through 3--3 of Figure 2, showing the aspirator.

Figure 4 is a sectional view similar to Figure 2 but showing the apparatus arranged for discharging or draining oil from the collector tank.

My oil removing apparatus for automobile crankcases includes a collector tank I, of sufficient size to accommodate the crankcase oil from several engines. The tank is equipped with a pair of wheels 2 and feet 3, so that it may be wheeled from place to place and stood on end. The top of the tank is closed and provided with a suitable handle 4. Near the bottom of the tank is a drain spout 5.

- centered on the'top of the tank'is an internally threaded: collar. 6 which receives the lower end of a'mani'fold or bodymember 1.. The manifold isprovided with. a recess 8- in its lower endcommunicatingw-ithitheinterior of thetank. Above the recess, the manifold is constricted, as indicated by- 9,,toform an internally threaded bore. Threaded in the constriction is a depending tube lfl whichprojectsa short distanceint'o thetank I.

- The-upper end of the manifold is enlarged and.

internally threaded toreceive a transparent shell or dome 12. "The: enlargement may be so arranged t'hat a conventionalglass jar may serve as the transparent shell. The upper portion of the manifold l is provided with an intake port l 3- which communicates with anintake tube M directed upwardly into the shell I2 and provided with adischarge slot- [5. communicates with an intake line l6 which in turn is attached to a tube I! for insertion into thecrankcase of an automobile engine through the oil filler tube. When not in use, the-tube I1 1 9* supported atthe side of the tank I.

The: manifold. 7 is provided. with a: laterally directednipple; 20 which communicates with the recess 8;. The. extended end of the nipple is joined to an aspirator body structure 2| which defines a Venturi bore 22. Venturi bore is an air jet 23 connected by'suitable fittings to an air. supply line 24. The extremity of. the aspirator body 2 l' is provided with a noz-- zlet 25, preferably curving laterally from the Venturi bore and so arranged" that it may be readily covered by the; palm of ones hand, for purposes: which will be brought out hereinafter.

Thetank ,l is equipped with a float 26 to which is; attacheda: stem 21- extending upwardly through thetubel0; The upper end of the stem is pro-,

vided with anindicator 28, preferably a cross;

member; so as-to'sminimizeinterference with flow 28 is adapted to raise into the transparent shell l2 and becomevisible when the tank is full or is almost full.

Removably screw threaded on the upper extremity of the intake tube I4 is a screw plug 29 which is also threaded for insertion into the constriction 9, so as to close off communication between the shell [2 and the interior of the tank.

Operation of my oil removing apparatus is as follows:

The tank is placed beside a vehicle and the tube I1 is inserted into the oil filler tube of the vehicle engine. An air supply is then connected The intake port I3 Directed into theto the aspirator so that air issuing from the jet 23 creates a vacuum in the recess 8, the tank I, and the transparent jar !2. This causes oil to flow from the crankcase into the shell 12, through the slot [5, then downwardly through the tube 16 into the tank I. During this Operation, the

condition and quality of oil removed can be observed. 4 V

The tank is of suiiioient size to receive the oil from several engines. When the fiow'indicator 28 indicates that the tank is filled to the desired capacity, the tank may be emptied by means of the drain spout 6. To facilitate emptying, or to permit discharge of the contents of the tank into another container which may be elevated, a hose may be connected to the drain spout and pressure applied to the interior .of the tank. This is accomplished, as shown in Figure 4, by placing the plug 29 into the constriction 9. Air is then discharged through the aspirator, but in this case the hand is placed over the nozzle 25 so that a nominal back pressure may be created in the tank I, so as to force the oil therefrom. It will be noted that by using ones hand to close the nozzle 25, it is impossible to build up any dangerous pressure in the tank I. Furthermore, this arrangement gives full control to the operator to minimize the danger of spillage or too rapid a flow from the spout.5. It will be observed that the transparent shell must be revacuum port below said constriction; an intake conduit communicating with said oil port and adapted to be inserted in the crankcase of a vehicle; a tube secured in said constriction and extending into said tank; an aspirator having a vacuum inlet communicating with said vacuum port to create a vacuum in said tank; a transparent dome covering the upper end of said body member whereby said oil port is subjected by reasonof communication through said tube to the vacuum pressure in said tank.

2. An oil removing apparatus for automobile crankcases, involving: a tank; a body member aflixed to the top of said tank, said body member having a vertical'bore constricted adjacent its upper end, an oil port above said constriction, and a vacuum port below said constriction; an intake conduit communicating with said oil port and adapted to be inserted in the crankcase of a vehicle; a tube secured in said constriction and extending into said tank; an aspirator having a vacuum inlet communicating with said vacuum port to create a vacuum in said tank; a transparent dome covering the upper end of said body member whereby said oil port is subjected, by reason of communication through said tube, to the vacuum pressure in said tank; a drain outlet for said tank; and a safety seal means for said tube-accessible only on removal of said dome to permit pressuring of said tank to drain oil therefrom.

3. An oil removing apparatus for automobile crankcases, involving: a tank; a body member affixed to the top of said tank, said body member having a vertical bore constricted adjacent its upper end, an oil port above said constriction, and a vacuum port below said constriction; an intake conduit communicating with said oil port and adapted to be inserted in the crankcase of a vehicle; atube secured in said constriction and extending into said tank; an aspirator having a vacuum inlet communicating with said vacuum port to create a vacuum in said tank; a trans-. parent dome covering the upper end of said body member whereby said oil portis subjected by reason of communication through said tube to the vacuum pressure in said tank; and a signal member movable in said tube and visible through said dome to indicate that said tank is full.

4. An oil removing apparatus for automobile crankcases, involving: a tank; a body member affixed to the top of said tank, said body member having a vertical bore constricted adjacent its upper end, an oil port above said constriction, and a vacuum port below said constriction; an intake conduit communicating with said oil port and adapted to lee-inserted in the crankcase of a vehicle; a tube secured in said constriction and extending into said tank; an aspirator having a vacuum inlet communicating with said vacuum port to create a vacuum in said tank a transparent dome covering the upper end of said body member whereby said oil port is subjected by reason of communication through said tube to the vacuum pressure in said tank; adrain outfit for said tank; a safety seal means for said tube accessible only on removal of said dome topermit pressuring of said tank to drain oil there- FREDERICK A. KOESTER.

REFERENCES CITED The following references are of record in the file of this patent:

p UNITED STATES PATENTS Number Name Date 1,393,272 Dutton Oct. 11, 1921 1,955,169 Bertschinger Apr. 17, 1934 

